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The service member killed was from the United States, said Capt. Jonathan Stock, a U.S military spokesman.

The death brings the total of U.S. service members killed this month to 44, coming close to July's total of 45, according to CNN tallies. July was the deadliest month for U.S. troops since the war in Afghanistan started in 2001.

ISAF was formed under a mandate by the United Nations to support the reconstruction of Afghanistan. NATO took command in 2003. The force includes about 50,000 troops from 42 countries.